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A024422
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a(n) = floor(Sum_{m=1..n} Stirling2(n,m) / binomial(n-1,m-1)).
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0
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1, 2, 3, 6, 12, 26, 62, 161, 448, 1338, 4274, 14524, 52289, 198678, 794065, 3328482, 14594217, 66779091, 318205958, 1575994324, 8098891289, 43115440260, 237435483669, 1350777074576, 7928871324300, 47965914249016, 298735745451523
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internal format)
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OFFSET
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1,2
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LINKS
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PROG
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(SageMath)
print([int(sum(stirling_number2(n, m)/binomial(n-1, m-1) for m in [1..n])) for n in [1..27]]) # Andrey Zabolotskiy, Jan 09 2024
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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